JP2006331726A - Electromagnetic relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic relay capable of easily adjusting contact gap. <P>SOLUTION: A movable spring 6 having a movable contact 3 is arranged between a first terminal plate 4 having a first contact 4 and a second terminal plate 6 having a second contact 2. On the electromagnet relay breaking a circuit by switching a first electric path and a second electric path by making the movable contact 3 selectively contact the first contact 1 or the second contact 2 by making the movable spring 6 move in accordance with excitation or non-excitation of the electromagnetic coil 13a. A protruded piece 10 for adjusting contact gap extending toward at least one side of the first terminal plate 4 or the second terminal plate 5 is formed on the movable spring 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electromagnetic relay capable of easily adjusting a contact gap.

  5A and 5B are a plan view and a front view of a conventional electromagnetic relay having a c contact (transfer contact).

  In this type of relay, a movable spring 106 provided with movable contacts 103, 103 'between two terminal plates 104, 105 provided with two fixed contacts 101, 102 provided corresponding to two electric paths. The movable contact 103, 103 'is moved between the two fixed contacts 101, 102 by moving the movable spring 106 by moving the operating piece 112 by energizing or de-energizing an electromagnetic coil (not shown). The closed circuit of the first and second electric circuits is switched in contact with either one.

  Therefore, one movable contact 103 provided on the movable spring 106 contacts the one fixed contact 101 by the elastic force of the movable spring 106 and closes the first electric circuit when the electromagnetic coil is not excited. Although the second electric circuit is open, the operating piece 112 is activated when the electromagnetic coil is excited, and the spring movable piece 111 coupled to the operating piece 112 causes the movable spring 106 to move to the other fixed contact 102. Since it is pushed to the terminal board 105 side, the movable contact 103 is separated from the one fixed contact 101, and instead, the movable contact 103 ′ is in contact with the other fixed contact 102, the first electric circuit is opened, and the second electric circuit is closed. . Then, when the electromagnetic coil is de-energized again, it returns to the original state, so that the second electric circuit is opened and the first electric circuit is closed.

  By the way, in order to normally operate such an electromagnetic relay, the distance when the movable contacts 103, 103 ′ and the fixed contacts 101, 102 are separated by adjusting the elastic force of the movable spring 106. That is, it is necessary to adjust the contact gap. This is because if this contact gap is not always kept at a normal interval, there is a possibility that rebound when the relay is turned off or a withstand voltage failure between the contacts may occur.

  Conventionally, however, there has been no guideline for adjusting such a contact gap, so that it is very difficult to hold the movable spring at a position that maintains the designed contact gap.

Note that Patent Document 1 describes a terminal structure in which a movable spring is provided with a stopper that abuts against a position regulating wall to regulate contact with a fixed contact. It is intended to regulate and is not intended to adjust the contact gap in advance.
JP 2000-32001 A

  The present invention has been proposed in view of such circumstances, and an object thereof is to provide an electromagnetic relay capable of easily adjusting a contact gap.

  In order to achieve the above object, the electromagnetic relay according to claim 1 is provided with a fixed contact on the terminal plate, a movable contact on the movable spring, and operating the movable spring when the electromagnetic coil is excited or de-energized. In an electromagnetic relay in which a movable contact is brought into contact with a fixed contact to close the electric circuit, at least one of the movable spring and the terminal plate is a contact gap for adjusting the distance between the fixed contact and the movable contact. An adjustment projecting piece is formed.

  The electromagnetic relay according to claim 2 is provided with a movable spring provided with a movable contact between first and second terminal plates each provided with a first fixed contact and a second fixed contact, and excitation and non-excitation of the electromagnetic coil. In the electromagnetic relay in which the movable contact is selectively brought into contact with the first and second fixed contacts and the first and second electric paths are switched to be closed, Is characterized in that a contact gap adjusting protruding piece extending to at least one side of the first or second terminal plate is formed.

  The electromagnetic relay according to claim 3 is provided with a movable spring provided with a movable contact between first and second terminal plates each provided with a first fixed contact and a second fixed contact, and excitation and non-excitation of the electromagnetic coil. In the electromagnetic relay in which the movable contact is selectively brought into contact with the first and second fixed contacts and the first and second electric circuits are switched to be closed by operating the movable spring in the first, At least one of the second terminal plates is formed with a contact gap adjusting protruding piece extending toward the movable spring.

  According to the electromagnetic relay according to any one of claims 1 to 3, since the contact gap protruding piece is provided on at least one of the movable spring and the terminal plate, or both, the contact gap at the time of separation is visually observed by the protruding piece. Thus, an appropriate contact gap can be adjusted to a normal state. As a result, the contact gap can always be maintained at a normal interval, and occurrence of problems such as rebound when the relay is turned off and a breakdown voltage between the contacts can be prevented.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows (a) a plan view and (b) a front view of an electromagnetic relay of the present invention applied to a c-contact.

  The electromagnetic relay includes the components described below, is configured on the insulating base 17, and is formed as a unit body that is entirely covered with a cover case (not shown).

  In the figure, 1 is a first fixed contact, 2 is a second fixed contact, and 3 is a movable contact. The movable contact 3 has a contact 3 a for the first fixed contact 1 and a contact 3 b for the second fixed contact 2. The first and second fixed contacts 1 and 2 are provided on the first and second terminal plates 4 and 5, respectively, and the movable contact 3 is provided on the movable spring 6.

  At one end of the movable spring 6, a rectangular contact gap adjusting protruding piece 10 extending toward the second terminal plate 5 is formed, and the movable spring urges an elastic force toward the first fixed contact 1 side. 6, the spring operating piece 11 is coupled to the operating piece 12 rotatably supported by the yoke 14 of the electromagnet block 13.

  The first and second terminal plates 4 and 5 and the movable spring 6 are fixed to a pedestal 16 placed on the base 17, and each of the first and second terminal plates 4 and 5 and the movable spring 6. The first and second electric circuit terminals 7 and 8 and the common terminal 9 connected to the base 17 protrude from the base 17 from below.

  The electromagnet block 13 has a bobbin around which an electromagnetic coil 13a is wound fixed to a yoke 14, and the operating piece 12 is supported so as to be rotatable about a rotation center 12a. Reference numeral 15 denotes a coil terminal protruding below the base 17 to energize the electromagnetic coil.

  Next, the contact / separation operation between the contacts will be described.

  When the electromagnetic coil 13a in the electromagnet block 13 is energized and excited, the operating piece 12 is attracted to the yoke 14 side located below, so that the operating piece 12 moves the spring movable piece 11 in the direction of arrow A. Accordingly, the movable contact 3a provided on the movable spring 6 is moved away from the first fixed contact 1 and the first electric circuit is opened, and the movable contact 3b is brought into contact with the second fixed contact 2 and the second electric circuit Is closed.

  Next, when the energization of the electromagnetic coil 13a is interrupted and returns to the non-excited state, the operating piece 12 returns to its original position by the elastic force of the movable spring 6, thereby pressing the movable movable piece 11 to the movable spring 6. Is released, the movable contact 3b is separated from the second fixed contact 2, the second electric circuit is opened, the movable contact 3a returns to contact with the first fixed contact 1, and the first electric circuit is closed. The

  Thus, this electromagnetic relay selectively moves the movable contact 3 to the first and second fixed contacts 1 and 2 by moving the movable spring 6 by excitation and non-excitation. Is closed in a switchable manner.

  Next, the contact cap adjusting protruding piece 10 which is a feature of the present invention will be described.

  The protruding piece 10 functions as a gauge for measuring a correct contact gap as designed. Maintaining the contact gap at a normal interval is an important design matter in order to prevent problems such as rebound at the time of contact between the contacts and failure of pressure resistance between the contacts. In the present invention, for example, FIG. In the example, with reference to the length X of the protruding piece 10 formed on the upper edge 6a of the movable spring 6 extending toward the second terminal plate 5, the edge 10a of the protruding piece 10 is separated from the edge 10a in a non-excited state. Therefore, the gap between the second fixed contact 2 and the non-uniformity of the second fixed contact 2 can be visually determined. Therefore, the contact gap between the separated movable contact 3 and the first fixed contact 1 in the excited state, and The contact gap between the separated movable contact 3 and the second fixed contact 2 in the non-excited state can always be maintained at the correct distance.

  FIG. 2 is a diagram showing another example applied to an electromagnetic relay having a c-contact configuration. In FIG. 2, only the main part is shown.

  In FIG. 2A, since the protruding pieces 10A and 10B extending in different directions are provided at both ends of the movable spring 6, the contact gap with the second fixed contact 2 can be measured by one protruding piece 10A. The contact gap with the first fixed contact 1 on the normally closed side can be measured by the other protruding piece 10B.

  2B and 2C show examples in which a protruding piece is provided on the fixed terminal plate side. (B) is an example in which the protruding pieces 10C are provided only on the second fixed terminal plate 5, and (c) is an example in which the protruding pieces 10D and 10C are provided on both the first and second terminal plates 4 and 5. . In any case, the contact gap can be measured by the positional relationship between the end edge 10a of the protruding piece 10C (10D) and the movable contact 3b (3a). In addition, since the other code | symbol in a figure is the same as that of the structure of FIG. 1, description is abbreviate | omitted.

  FIGS. 3A and 3B are explanatory views of the electromagnetic relay of the present invention corresponding to the a contact and the b contact. In the figure, only the main part is shown.

  In the case of the a contact configuration, the contact gap between the movable contact 3 and the fixed contact 1 is measured by the protruding piece 10 provided on the movable spring 6. Since this is a normally open type, the contact gap may be measured and adjusted when the electromagnetic coil is not energized between the contacts.

  Similarly, in the case of the b contact configuration, the contact gap between the movable contact 3 and the fixed contact 1 is measured by the protruding piece 10 provided on the movable spring 6. Since this is a normally closed type, the contact gap may be measured and adjusted in such a state that the electromagnetic coil is excited to separate the contacts.

  In either case, the protruding piece 10 is provided on the movable spring 6, but may be provided on the terminal plate 4.

  FIGS. 4A, 4B, and 4C are conceptual diagrams showing contact states at the time of non-excitation of an electromagnetic relay having an a contact, a b contact, and a c contact.

  The a-contact configuration is a normally open type contact configuration in which the contact is open when the electromagnetic coil is not excited, and is closed when excited. The b-contact configuration is a normally-closed contact configuration in which the terminal is closed when the electromagnetic coil is not energized and opens when energized.

  Further, in the c contact configuration, the common terminal Ts and the first and second fixed terminals Ta and Tb are configured. When the electromagnetic coil is not excited, the first fixed terminal and the common terminal are closed, and the second Since the fixed terminal and the common terminal are in an open state, only the first electric circuit is closed, and when excited, the first fixed terminal and the common terminal are opened, and the second fixed terminal and the common terminal are closed. Only the second electric circuit is closed by switching.

It is (a) top view and (b) front view of an electromagnetic relay having a c contact to which the present invention is applied. It is a figure which shows the contact structure of an electromagnetic relay to which this invention was applied. (A), (b) is explanatory drawing of the electromagnetic relay which has a contact and b contact to which this invention was applied. It is a conceptual explanatory drawing which shows the basic composition of a contact, b contact, and c contact applied to an electromagnetic relay. It is (a) top view and (b) front view of the conventional electromagnetic relay which has c contact.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st fixed contact 2 2nd fixed contact 3 Movable contact 4 1st terminal board 5 2nd terminal board 6 Movable spring 7 1st electric circuit terminal 8 2nd electric circuit terminal 9 Common terminal 10 For contact gap adjustment Projection piece 10a Edge of projection piece 11 Spring movable piece 12 Actuation piece 13 Electromagnet block

Claims (3)

In an electromagnetic relay in which a fixed contact is provided on the terminal plate, a movable contact is provided on the movable spring, and the movable spring is operated when the electromagnetic coil is energized or de-energized, thereby bringing the movable contact into contact with the fixed contact and closing the circuit. ,
At least one of the movable spring and the terminal plate is formed with a contact gap adjustment projecting piece for adjusting an interval when the fixed contact and the movable contact are separated. Electromagnetic relay. A movable spring provided with a movable contact is provided between first and second terminal plates each provided with a first and second fixed contact, and the movable spring is operated by excitation and de-excitation of an electromagnetic coil. In the electromagnetic relay in which the movable contact is selectively brought into contact with the first and second fixed contacts and the first and second electric circuits are switched and closed,
An electromagnetic relay according to claim 1, wherein the movable spring is formed with a contact gap adjusting protruding piece extending at least on one side of the first or second terminal plate. A movable spring provided with a movable contact is provided between first and second terminal plates each provided with a first and second fixed contact, and the movable spring is operated by excitation and de-excitation of an electromagnetic coil. In the electromagnetic relay in which the movable contact is selectively brought into contact with the first and second fixed contacts and the first and second electric circuits are switched and closed,
An electromagnetic relay characterized in that at least one of the first and second terminal plates is formed with a contact gap adjusting protruding piece extending toward the movable spring.

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